The FGI Pond Leakage Calculator Geomembranes v. Compacted Clay Liners
Fresh water is a precious resource with demands rising daily and supply greatly fluctuating. Only two (2) percent of all water on Earth is fresh water with the other 98% being salt water. This 2% of fresh water is comprised of: 87% ice, 12% groundwater, and 1% rivers and lakes. Thus, only 13% of the available freshwater is readily accessible. Therefore, it is imperative that we capture and hold these limited water resources for agriculture, domestic use, and industry and also protect valuable groundwater from surface or subsurface contamination.
The FGI’s Pond Leakage Calculator is a Microsoft EXCEL spreadsheet based on Darcy's Law of Seepage and provides a comparison between leakage rates from a canal, pond, or reservoir constructed with compacted fine-grained soils and a geomembrane liner system. The Leakage Calculator allows the user to input the size of the containment basin (including length, width, depth, side slope angle and freeboard), the anticipated level of hydraulic conductivity of the compacted soil or geomembrane liner, and the relative cost of water in dollars per acre-foot of water.
The Calculator then calculates the volume of the basin in gallons, a comparison of leakage rates between the compacted soil and geomembrane liner systems in gallons, and the cost of the leakage based on the cost of water per acre-foot to replace it. This Calculator is designed to help consultants, engineers, architects, and end users decide how to line their canals, ponds, reservoirs, and basins to capture and/or protect valuable fresh water. The Calculator does not consider variances in construction quality and operational techniques on the long-term effectiveness of the chosen liner system. The FGI has additional research and publications to help with other aspects of successful water containment applications.
Types of Geomembranes Four (4) popular types of geomembranes are available for pond liner systems. These four (4) geomembranes in ALPHABETICAL order are: (1) EPDM, (2) reinforced polyethylene (RPE), (3) Polypropylene (PP), and (4) Polyvinyl Chloride (PVC). EPDM (Ethylene Propylene Diene Monomer) geomembranes are unreinforced and have been used for the construction of ponds of varying kinds. EPDM geomembranes are made from rubber and can be welded together with tape and primer. EPDM can be reinforced or unreinforced. RPE geomembranes have a high tensile strength and puncture resistance because they are reinforced. RPE geomembranes also can be welded with heat. PP geomembranes can be unreinforced or reinforced depending on the application. Reinforced PP geomembranes also have a high tensile strength and puncture resistance because they are reinforced. PVC geomembranes are also unreinforced and have been used successfully for decades in water canals, ponds, and reservoirs. PVC geomembranes can be welded with heat and/or solvents.
Please click below to access FGI’s Pond Leakage Calculator.
The Fabricated Geomembrane Institute (FGI) is pleased to welcome its newest manufacturer member, Canadian General Tower (www.cgtower.com). CGT is headquartered in Ontario, Canada with additional manufacturing facilities in the United States and China, an innovation design studio in Michigan and international sales offices in Germany, France, China, Japan, and Canada. CGT specializes in high quality coated fabrics and films used in a variety of automotive, industrial, aquatic,construction and geomembrane applications. Their FGI liaison is Mike Thrasher, Construction Director, who can be reached at firstname.lastname@example.org. Please help us welcome CGT to the FGI!!!!
FGI is Now Accepting Applications for the Fabricated Geomembrane Engineering Innovation Award
The Fabricated Geomembrane Engineering Innovation Award was created to recognize engineers who have creatively used fabricated geomembranes to successfully fulﬁll a client/owner’s needs, including technical requirements, scheduling and budget.
Today’s engineers are working to solve environmental issues on a global scale. FGI’s Fabricated Geomembrane Engineering Innovation Award competition pays tribute to exemplary engineers who utilize fabricated geomembranes to creatively solve a problem on an important project.
How the Program Works
An engineer, regulatory person, owner, installer or contractor can submit a project for award consideration. An award application must be ﬁlled out and submitted by January 15, 2019. A distinguished panel of three judges representing a cross section of industry, government, academia and media, will evaluate the submissions and rank them based on engineering excellence, uniqueness and innovation.
This program is open to all engineers and designers.
The deadline for submitting anapplication is: January 15, 2019.
Download the award application today!!! The FGI looks forward to recognizing an engineer/designer for their important and innovative work utilizing fabricated geomembranes.